Synonyms: ApUpG;Adenylyl-(3'.5')-uridylyl-(3'.5')-guanosine;[(2R,3S,4R,5R)-3-{[{[(2R,3S,4R,5R)-5-(2-amino-6-oxo-3,6-dihydro-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methoxy}(hydroxy)phosphoryl]oxy}-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-hydroxytetrahydrofuran-2-yl]methyl (2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl hydrogen phosphate (non-preferred name)